1. communism a theory favoring collectivism in a classless society
  2. common sense sound practical judgment
  3. commonsense exhibiting native good judgment
  4. common room a sitting room (usually at school or university)
  5. commensurate corresponding in size or degree or extent
  6. common noun a noun that denotes any or all members of a class
  7. common stock stock other than preferred stock
  8. communist economy the managed economy of a communist state
  9. common sorrel large sour-tasting arrowhead-shaped leaves used in salads and sauces
  10. common broom deciduous erect spreading broom native to western Europe
  11. common hyacinth widely grown for its fragrance and its white, pink, blue, or purplish flowers
  12. common amsinckia annual of western United States with coiled spikes of yellow-orange coiled flowers
  13. common soldier an enlisted man of the lowest rank in the Army or Marines
  14. commensalism when one organism benefits from another without damaging it
  15. common iguana large herbivorous tropical American arboreal lizards with a spiny crest along the back; used as human food in Central America and South America
  16. common fennel strongly aromatic with a smell of aniseed
  17. common canary native to the Canary Islands and Azores
  18. common shiner the common North American shiner
  19. common time a time signature indicating four beats to the bar
  20. common osier willow with long flexible twigs used in basketry